Dash, Joan. The Longitude
Prize. Farrar, Straus and Giroux,
New York: 2000. 200 pages. Tr. $16.00 ISBN 0374346364
Annotation
The
Longitude Prize is the story of John Harrison, the man
who accomplished the seemingly impossibility of calculating longitude in the
eighteenth century.
Review
Joan Dash’s The
Longitude Prize recounts the life of Englishman John Harrison who spent the
greater part of his life attempting to perfect a sea clock which would allow
sailors to determine their longitude when on the open ocean. In the 1700’s clocks were still hard to come
by and difficult to construct, which is why it is all the more amazing that
Harrison taught himself to construct clocks and highly accurate clocks at
that. Dash explains that one way sailors
calculated longitude in the eighteenth century was by using time. However, clocks depended on a balanced
pendulum to keep accurate time and the pitch of a ship would through off the
balance of a clock, making it impossible to accurately tell time while at
sea. Calculating longitude was of such
importance that British Parliament formed the Longitude Board who offered a
prize to anyone who could come up with an accurate method of calculating
longitude at sea. After designing highly
accurate clocks on land, Harrison made it his life’s mission to develop a sea
clock which would allow sailors to calculate their longitude. Though the Longitude Board never officially recognized
his achievement and it took the better part of his life to perfect, Harrison
did indeed succeed in creating such a clock.
Awards/Honors
ALSC Notable Book 2001
Sibert Honor Book 2001
Front
and Back Matter
TOC, Afterword, Glossary, Timeline, Bibliography,
Index
Author’s
Website
None